I was delving into the Objective Lamb Weather dataset maintained by the Climate Research Unit [CRU] at the University of East Anglia [UEA] as you do, and decided to rank some of the parameters in the dataset and place them in a tabulated grid, and at the same time display the matching surface chart from the Wetterzentrale archive. The UEA produce four datasets for the hours of 00, 06, 12 & 18, but I decided to use the midnight one so I could display the corresponding file from the Wetterzentrale archive. The only drawback with this is the Lamb Weather Type is not calculated as it is with 1200 UTC data. So before you write in complaining about why the great storm of 1987 doesn't appear, its due to the fact that it was at its height at around 0600 UTC (or maybe an hour or so later) and would have slipped through the net.

More details and images in the blog:

(1) Highest daily 0000 UTC Gale Index (1871-2014)
(2) Highest daily 0000 UTC MSLP (1871-2014)
(3) Lowest daily 0000 UTC MSLP (1871-2014)

http://xmetman.wordpress.com/2014/03...ht-since-1871/

On Sunday, 23 March 2014 11:14:51 UTC, exmetman wrote:
I was delving into the Objective Lamb Weather dataset maintained by the Climate Research Unit [CRU] at the University of East Anglia [UEA] as you do, and decided to rank some of the parameters in the dataset and place them in a tabulated grid, and at the same time display the matching surface chart from the Wetterzentrale archive. The UEA produce four datasets for the hours of 00, 06, 12 & 18, but I decided to use the midnight one so I could display the corresponding file from the Wetterzentrale archive. The only drawback with this is the Lamb Weather Type is not calculated as it is with 1200 UTC data. So before you write in complaining about why the great storm of 1987 doesn't appear, its due to the fact that it was at its height at around 0600 UTC (or maybe an hour or so later) and would have slipped through the net.



More details and images in the blog:



(1) Highest daily 0000 UTC Gale Index (1871-2014)

(2) Highest daily 0000 UTC MSLP (1871-2014)

(3) Lowest daily 0000 UTC MSLP (1871-2014)



http://xmetman.wordpress.com/2014/03...ht-since-1871/

Is that purely at Midnight or did it last several seconds longer.

Good point - no exactly 00:00:00.

Mind you, as an observer I was taught to leave reading the barometer to last, so it might be skewed where there are land observations to around 23:50.